JP3187359B2 - Quantitative dispensing control device for coal and other dispensing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of discharging coal piled up in a pile (referred to as an object to be discharged) by a discharging machine such as a reclaimer and transferring the coal to a predetermined place using a belt conveyor device. The present invention relates to a dispensing amount control device for dispensing an object (conveyed object).

[0002]

2. Description of the Related Art Conventionally, especially in quantitative mixing using two subsequent belt conveyors, since the quantitativeness of dispensing by a reclaimer is not sufficiently ensured, a hopper and a quantitative dispenser that absorb variations in the dispensing amount are conventionally used. A separate device is provided so that the articles can be quantitatively mixed. Such a device is used, for example, when mixing different types of coal in accordance with the calorific value required in a thermal power plant.

A prior art of this kind is disclosed in Japanese Patent Application Laid-Open No. 57-102.
There is a control device described in Japanese Patent No. 437. This device is for a chain scraper type reclaimer, and performs a comparison operation between a set discharge amount and a discharge amount of an object to be discharged detected by a load current of a scraper motor, and controls at least one of a traveling speed of the reclaimer and an elevation angle of a boom. By doing
It is intended to make the actual payout amount of the article to be paid coincide with the set payout amount.

Further, there is a control device described in Japanese Patent Application Laid-Open No. 54-88557. This device has a set payout amount,
By comparing and calculating the discharge amount of the discharge object detected by the weighing machine installed on the belt conveyor device on the downstream side of the switching damper and controlling the opening degree of the switching damper, the discharge object is divided into an arbitrary ratio. It is to try to make it.

[0005]

However, the above-mentioned conventional control device has the following problems to be solved. That is, an apparatus for performing quantitative mixing using two subsequent belt conveyors requires a hopper and a quantitative cut-out device, and thus requires an extra space for installing them.
Equipment costs are also required.

The device disclosed in Japanese Patent Application Laid-Open No. 57-102437 indirectly detects the amount of the reclaimer to be dispensed based on the load current of the motor. It is difficult to match the amount to the set payout amount. In addition, the weighing machine installed in the reclaimer is affected by the traveling direction, traveling speed, and traveling position of the reclaimer, and the measurement accuracy is reduced. ,
The payout amount may not match the set payout amount. Furthermore, variations in the pile shape of the articles to be paid, types of the articles to be paid,
Since there is a variation in the bulk specific gravity of the article to be paid due to a difference in the consolidation state or the like in the pile, it is necessary to control in consideration of these conditions.

In Japanese Patent Application Laid-Open No. 54-88557, since a weighing machine is provided only at one exit side of a switching damper, if the amount of articles to be paid to the switching damper fluctuates, it cannot be divided at a set ratio. . Also, since the so-called dead time caused by the distance between the switching damper and the weighing machine is not taken into account, the control system may cause hunting and stabilize the articles to be paid at a predetermined ratio. There is a high possibility that it cannot be split. That is, when the payout amount of the article to be paid out distributed by the distribution chute is detected by the weighing machine installed in the subsequent belt conveyor device, a dead time exists. Since it cannot be shortened so as to be negligible compared to the fluctuating period, the amount of distribution by the distribution chute cannot be directly controlled by a signal from the weighing machine.

[0008] Further, in the case of quantitatively mixing the articles to be dispensed, a plurality of distribution chutes are required for a belt conveyor device for mixing, but a weighing machine corresponding to a distribution chute provided downstream of the belt conveyor device is required. In addition, not only the weight of the object to be distributed distributed by the distribution chute but also the weight obtained by adding the weight of the object to be distributed distributed by the upstream distribution chute is detected. For this reason, the distribution chute on the downstream side cannot be controlled using the signal from the weighing machine as it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and can secure a predetermined amount of articles to be ejected without providing a hopper or a fixed quantity extracting device, and can provide a subsequent belt conveyor comprising two or more systems. The present invention provides a fixed-rate dispensing control device capable of distributing articles to be paid to devices at a preset distribution ratio and consequently quantitatively mixing the articles to be dispensed from two dispensing machines by a conveyor device of each system. The purpose is.

[0010]

In order to achieve the above-mentioned object, a fixed-rate dispensing control device according to the present invention is provided with a boom provided with a continuous scraping mechanism, which is provided so as to be able to move up and down, and a reclaimer which runs along a track. A fixed amount dispensing control device in a dispensing facility for dispensing an object to be discharged such as coal through a continuous scraping mechanism to a subsequent belt conveyor device and discharging the same by a belt conveyor device provided in parallel with the track, wherein the reclaimer A first control means for controlling a traveling speed of the reclaimer according to a set payout amount of the reclaimer; a second control means for correcting a set payout amount of the reclaimer according to a traveling direction and a traveling speed of the reclaimer; The integrated value of the discharge flow rate measured by the weighing machine provided in the reclaimer is compared with the integrated value of the discharge flow rate measured by the weighing machine provided in the subsequent belt conveyor device. A third control unit that corrects the discharge flow rate measured by the weighing machine of the reclaimer according to the calculation result, and a weighing machine provided in the reclaimer while the set discharge amount and the reclaimer travel a predetermined distance. And a fourth control means for performing a comparison operation with the measured average dispensed flow rate per unit time and controlling the traveling speed of the reclaimer by the first control means in accordance with the calculation result.

According to the dispensing amount control device of the present invention having the above-described configuration, the dispensing amount required by the subsequent belt conveyor device by using the second control means is determined by the traveling direction and the traveling speed of the reclaimer. The amount of the reclaimer to be dispensed can be set in consideration of the change in the absolute flow rate in advance, and the third control means can be used to output the signal from the weigher on the reclaimer side based on the signal from the weigher of the subsequent belt conveyor device. In order to compensate for the difference between the equipment accuracy and measurement error of both sides is minimized and the accuracy of the weighing machine on the reclaimer side is increased, so the discharge flow rate and setting caused by using the discharge amount signal of the weigher on the reclaimer side The difference between the volume and the volume can be minimized. Can correspond to variations of the flow rate, by via a first control means for adjusting the running speed of the reclaimer, it is matched to the set amount a payout amount.

As set forth in claim 2, the correction of the set payout amount by the second control means is performed by multiplying the set payout amount by a correction coefficient α calculated by the following equation. (V) ÷ ｛(V) ± (v)｝ V; conveyor belt running speed of the reclaimer belt conveyor device v; running speed of the reclaimer ± in the above equation is determined by the running direction of the reclaimer,
If the direction is the same as the traveling direction of the conveyor belt, the value is +, and if the direction is opposite, the value is-.

The correction of the discharge flow rate measured by the weigher of the reclaimer by the third control means is performed by adding the second control means to the integrated value of the discharge flow rate measured by the weigher provided in the subsequent belt conveyor device. By multiplying the correction coefficient α calculated by the above, the integrated value of the reclaimer-based discharge flow corrected and corrected, the discharge value of the discharge flow measured by a weighing machine provided in the reclaimer synchronized with the integrated value in time and period The correction can be performed by multiplying the discharge flow rate measured by the weighing machine of the reclaimer by the correction coefficient γ calculated by dividing by the integrated value.

According to the second aspect of the present invention, since the reclaimer relatively moves with respect to the belt conveyor device that conveys the articles to be dispensed, the moving direction of the reclaimer (the traveling direction of the conveyor belt of the belt conveyor device). It is necessary to correct the payout flow rate set according to the traveling direction of the reclaimer and the same direction or the opposite direction. This correction is performed by multiplying the set payout amount by a correction coefficient α.

Further, according to the identification amount dispensing control device, since all the weighing devices provided on the subsequent belt conveyor device are installed on the ground, the measurement accuracy is higher than that of the weighing device installed on the reclaimer. In consideration of the flow rate measured by the weighers, the flow rate of the weigher of the reclaimer is multiplied by the correction coefficient γ to calculate the correction value of the flow rate of the weigher of the reclaimer.

According to a third aspect of the present invention, the dispensing flow rate measured by the weighing machine of the reclaimer corrected by the third control means is averaged by the fourth control means to calculate an actual average dispensing flow rate. A correction coefficient β is calculated by dividing the set dispensed amount by the actual average dispensed flow rate, and a reference traveling speed is calculated for each boom undulation angle according to the set dispensed amount of the reclaimer. The running speed of the reclaimer can be determined by multiplying by β.

According to the third aspect of the present invention, the dispensing flow rate of the reclaimer is calculated by integrating the dispensing flow rate while the reclaimer travels a predetermined distance and calculating the average dispensing flow rate per unit time. By multiplying the reference traveling speed calculated in advance by the specific gravity correction coefficient β according to the amount of payout set for each boom angle of the boom of the reclaimer without being affected every moment by the pile state of the object, etc. Is set, and the rotation speed of the variable speed motor for traveling of the reclaimer is set.

According to a fourth aspect of the present invention, the succeeding belt conveyor device comprises two belt conveyor devices, and two belt conveyor devices are separated from each other in the running direction so as to be a belt conveyor for a dispensing machine such as two reclaimers. In a coal or other dispensing facility in which the devices are connected via distribution chutes, objects to be discharged such as coal discharged by a fixed-rate dispensing machine such as one reclaimer are supplied to two subsequent belt conveyors at a preset ratio. By distributing by a distributing chute and distributing articles to be paid out by a second dispensing machine further downstream in the same manner to the succeeding belt conveyor, two machines are arranged on the succeeding belt conveyor of each system. In a fixed-rate dispensing control device for quantitatively mixing articles to be dispensed from a dispensing machine, a predetermined weight is set by a weighing machine provided corresponding to an upstream distribution chute. PI movement of the difference between the average dispensing flow rate measured and calculated for a predetermined time and the set dispensing flow rate calculated by the set distribution ratio of the two following belt conveyor devices is calculated to calculate the movement amount of the partition position of the distribution chute. And
Control means for controlling the distribution amount (fifth control means 6 in the embodiment)
1) and calculating the average dispensed flow rate measured and calculated by the weighing machine corresponding to the upstream distribution chute when the object to be discharged reaches the weighing machine corresponding to the downstream distribution chute from the upstream weighing machine. Value tracked for required time (payout amount)
Is reduced from the average discharge flow rate measured and calculated by the weighing machine corresponding to the distribution chute on the downstream side, so that the average discharge of the articles to be dispensed from the distribution chute on the downstream side to each of the two belt conveyor devices is reduced. Calculate the flow rate,
Another control means (the sixth control means 6 in the embodiment ) having the same function as the control means ( the fifth control means 61 in the embodiment).
2) .

According to the fourth aspect of the present invention, by using the control means (61) , the influence of the dead time existing in the control system and the influence of the short-period fluctuation such as the discharge flow rate of the object to be discharged are obtained by using the control means (61). Without being received, the dispensing flow distribution ratio of the articles to be dispensed to be distributed to the succeeding belt conveyor device by the distribution chute can be made substantially equal to a preset flow rate ratio, and two dispensing machines are provided. In the dispensing facility, by controlling the downstream distributing chute with respect to the dispensing flow rate of the dispensing machine such as the corresponding second reclaimer by using another control means (62) , the distributing ratio of the dispensed material to the set ratio. Can be matched, so that each of the two belt conveyor systems
Quantitative mixing of objects to be paid out from the paying machine of the machine is possible.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a fixed amount dispensing control device according to the present invention.

FIG. 1 is a perspective view showing a rake chain type reclaimer as a discharging machine for discharging coal from a coal pile in a coal yard, FIG. 2 is a perspective view showing an example of a distribution chute, and FIG. 3 is a reclaimer shown in FIG. FIG. 4 is a plan view schematically showing equipment for quantitatively mixing coal by two subsequent belt conveyor devices via distribution chutes, and FIG. 4 is a block diagram showing an embodiment of a quantitative dispensing control device for a reclaimer in FIG. 5 and FIG. 5 are block diagrams showing an embodiment of the fixed amount (mixed) dispensing control device of the dispensing equipment of FIG.

As shown in FIG. 1, a rake chain type reclaimer 1 is movably mounted on a pair of tracks 2 laid in parallel at a predetermined interval. Reclaimer 1
The rake chain type booms 3 protrude from both sides of the main body 1a with the track 2 interposed therebetween. Each boom 3 has a rake chain 3a as a continuous scraping mechanism, and is undulated (elevated) with the lower end as a fulcrum. It is free. Between the tracks 2, 2 a belt conveyor device 4 is arranged parallel to them. As shown in FIG. 3, the reclaimer body 1
a is equipped with a weighing machine 31.
Is provided below the conveyor belt of the belt conveyor device 4 so as to move integrally with the reclaimer main body 1a.

As shown in FIG. 3, the quantitative mixing and dispensing apparatus 10 according to the present embodiment includes two succeeding belt conveyor devices 11 and 12 for quantitative mixing in parallel at a predetermined interval. For both belt conveyor devices 11 and 12, the belt conveyor devices 4 of the two reclaimers 1 have distribution chutes 13 and distribution chutes 1 respectively.
4 are connected. The belt conveyor device 4 of the first reclaimer 1 includes a belt conveyor device 11,
At the beginning of the belt conveyor device 12, the belt conveyor device 4 of the second reclaimer 1 is located in the middle of the running direction of the belt conveyor devices 11 and 12, respectively. In each belt conveyor device 11, 12, each distribution chute 13
Immediately downstream of 14, a weigher 33 / weigher 34 and a weigher 35 / weigher 36 are installed, respectively. In FIG. 3, the weighing machines to 33 to 36 are shown in the middle of the conveyor belts of the belt conveyor devices 11 and 12, but actually installed below the conveyor belt.
Reference numeral 32 in the figure is a weighing machine installed in the reclaimer 1.

As shown in FIG.
3 (and 14) has a structure in which the upper input port 18a is common and the lower drop port 18b is bifurcated, and the distribution chute 18 provided with a fixed partition plate 18c in the middle has a longitudinal direction of the lower input port 15. It is deployed so that it can be moved. One end of the belt conveyor device 4 of the reclaimer 1 is connected to the input port 18a of the distribution chute 18, and the distribution chute 18 moves in the width direction of the belt conveyor device 4 to distribute the belt to the belt conveyor devices 11, 12. The percentage is adjusted. Although not shown, in order to move the distribution chute 18, driving means 78 and 79 (see FIG. 5) including actuators such as a hydraulic cylinder and a motor-driven screw shaft are used.
It is connected to the.

FIG. 3 shows an embodiment of a fixed-rate payout control device.
This will be described with reference to FIG.

First, the control of the reclaimer 1 alone will be described. As shown in FIG.
It comprises a control means 21, a second control means 22, a third control means 23 and a fourth control means 24.

The first control means 21 controls at least one of the up-and-down angle (elevation amount) and the traveling speed of the boom 3 in accordance with the set amount of the reclaimer 1, and in this example, the reclaimer traveling speed calculator 40. Consists of

The second control means 22 is means for correcting the set discharge flow rate of the reclaimer 1 to the conversion base of the belt conveyor device 4 for actually dispensing according to the traveling direction and the traveling speed of the reclaimer 1. 41, a payout set amount corrector 42, and a correction coefficient calculator 43 based on the reclaimer traveling direction.

The third control means 23 controls the integrated value of the dispensed amount measured by the weighing machine 31 provided in the reclaimer 1 and the subsequent (downstream) belt conveyor devices 11 and 12.
Means for calculating the sum of the sums of the payout amounts measured by the weighing machines 33 and 34 provided in the reclaimer 1 and correcting the payout amount measured by the weighing machine 31 of the reclaimer 1 according to the comparison result. In addition to the heavy equipment correction coefficient calculator 44, an integrating circuit 45, a storage 46, an amplifier 4
7, an integrating circuit 48 and an amplifier 49 are provided.

The fourth control means 24 compares and calculates the average dispensed flow rate and the set dispensed amount while the reclaimer 1 travels a predetermined distance, and according to the result, among the reclaimers 1 of the first control means 21, In this example, it comprises an averaging circuit 50, a specific gravity correction coefficient calculator 51, and an amplifier 52.

Then, the control device 20 controls the rotation speed of the variable speed motor 53 for reclaimer travel as described below, thereby adjusting the amount of the reclaimer 1 to be dispensed. (1) The amount of coal to be discharged by the reclaimer 1 per unit time (for example, 5
00 ton / h). Since the reclaimer 1 relatively moves with respect to the belt conveyor device 4 that conveys coal, the moving direction of the reclaimer 1 (the belt conveyor device 4).
It is necessary to calculate the set value of the base of the reclaimer 1 by correcting the discharge flow rate set according to the traveling direction of the reclaimer 1 (in the same direction as the traveling direction of the conveyor belt in FIG. 3 or in the opposite direction) and the traveling speed of the reclaimer 1. This correction is performed by the payout set amount corrector 42, and is performed by multiplying the set payout amount by the correction coefficient α. The correction coefficient α is calculated by the reclaimer correction coefficient calculator 43 based on the following equation according to the traveling direction and the traveling speed of the reclaimer 1.

Α = (V) ÷ ｛(V) ± (v)｝ V; conveyor belt traveling speed of the belt conveyor device v; traveling speed of the reclaimer 1 ± in the above equation depends on the traveling direction of the reclaimer 1 In the case of the same direction as the traveling direction of the conveyor belt, +,
In the case of the reverse direction, it is set to-.

(2) The weighing machine correction coefficient calculator 44 calculates the sum of the integrated flow rates of the weighing machines 33 and 34 of the distribution chutes 13 and 14 output from the integrating circuit 48, and uses the running direction correction coefficient α by the amplifier 47. Of the reclaimer 1 output from the storage unit 46 which is synchronized with the integrated flow rate converted to the base on the reclaimer 1 and the integrated flow rate of the base of the reclaimer 1 in time.
The correction coefficient γ of the discharge flow rate of the reclaimer 1 measured by the weighing machine 31 is calculated by the integrated flow rate of the weighing machine 31. The correction coefficient γ is calculated based on the following equation.

Γ = ｛weigher 33 of distribution chute 13
Of the integrated flow rate based on the reclaimer 1 and 34
÷ (Integrated flow rate of the weighing machine 31 of the reclaimer 1) Since all the weighing machines 33 (or 34) are installed on the ground, the weighing machine 31 installed in the reclaimer 1 is used.
Since the measurement accuracy is higher than that of
The payout flow rate measured in (or 34) is considered.

(3) The amplifier 49 amplifies the signal of the weighing machine 31 of the reclaimer 1 by using the signal from the weighing machine correction coefficient calculator 44 as an amplification factor, and multiplies the flow rate of the weighing machine 31 by the correction coefficient γ. To calculate the correction value.

(4) The payout set amount corrector 42 adds the correction coefficient α to the payout amount set by the payout amount setter 41.
To calculate the set value of the reclaimer 1 base.

(5) In the averaging circuit 50, the amplifier 49
Are integrated while the reclaimer 1 travels a predetermined distance and averaged over the required time to calculate the actual average dispensed flow rate during this time. The specific gravity correction coefficient calculator 51 calculates a specific gravity correction coefficient β based on the following equation. Since the discharge flow rate changes every moment depending on the state of the pile of coal and the like, the discharge flow rate while the reclaimer 1 travels a predetermined distance (for example, 5 m) is integrated, and the average discharge flow rate per unit time is obtained.

Β = (set dispensing flow rate) ÷ (actual average dispensing flow rate) (6) The reclaimer traveling speed calculator 40 calculates a reference traveling speed for each up-and-down angle of the boom 3 according to the set dispensing amount of the reclaimer 1. The operating speed set value is determined by multiplying this value by the above specific gravity correction coefficient β by the amplifier 52, and the variable speed motor 53 for traveling of the reclaimer 1 is determined.
Set the rotation speed of. The variable speed motor 53 is also connected to a reclaimer position detector 54, from which a position data signal of the reclaimer 1 is input.

As described above, the actual dispensed flow rate from the reclaimer 1 becomes substantially equal to the set dispensed amount.

Here, the control of the quantitative mixing equipment of this embodiment further provided with two subsequent belt conveyor devices will be described. As shown in FIG. 5, the control device 60 comprises a fifth control means 61 and a sixth control device. Means 62.

The fifth control means 61 comprises two systems of belt conveyors 11 following the upstream distribution chute 13.
The average dispensing flow rate measured and measured by a weighing machine of 12 to a predetermined interval at a predetermined interval, and the set dispensing flow rate calculated from the set distribution ratio to the two belt conveyor devices 11 and 12. Control means for calculating the amount of movement of the distribution chute 13 by controlling the amount of movement of the distribution chute 13 and controlling the amount of distribution.
66, a distribution flow rate setting device 67, and a distribution chute movement amount PI calculator 68.

The sixth control means 62 uses the average payout flow rate measured and calculated by the weighing machines 33 and 34 corresponding to the upstream distribution chute 13 in the two belt conveyor devices 11 and 12 as the payout object. The value (payout amount) that has been tracked for the time required for the coal to reach the weighers 35 and 36 corresponding to the downstream distribution chutes 14 from the upstream weighers 33 and 34 is transferred to the downstream distribution chutes 14. Corresponding weigher 35.3
The fifth control, wherein the average discharge flow rate of the coal distributed from the downstream distribution chute 14 to each of the two belt conveyor devices 11 and 12 is calculated by subtracting from the average discharge flow rate measured and calculated in 6. Control means for the downstream distribution chute having the same function of controlling the distribution amount as the means 61, and in this example, averaging circuits 70 and 71
The fifth control means 61 is provided with a distribution flow rate setting device 72 and a distribution chute movement amount PI calculator 73. In addition to these, the sixth control means 62 stores the memories 74 and 75 and the subtractors 76 and
77 is provided.

In addition, the control device 60 includes a mixing ratio setter 76, a PI calculator 68 or a PI calculator 68 which can simultaneously set the distribution flow rate setting device 67 of the fifth control means 61 and the distribution flow rate setting device 72 of the sixth control means 62. A distribution chute driving means 78, 79 for moving the distribution chute section 18 in accordance with a signal from the arithmetic unit 73 is provided. Each driving means 78, 79 includes a distribution chute position detector 80,
81 are connected.

The control unit 60 controls the drive means 78 and 79 of the upstream and downstream distribution chute sections 18 as described below, respectively, to adjust the coal mixing ratio. (7) As shown in FIG. 3, in the two subsequent belt conveyor devices 11 and 12, the weighing machines 33 and 34 and the downstream distribution chutes 14 corresponding to the upstream distribution chutes 13 of the respective devices 11 and 12 are provided. Weigher 3 corresponding to
Sampling of the dispensing flow rate signal from 5.36 is performed by the averaging circuits 65 and 66 (or 70.71) for a predetermined time at predetermined time intervals and averaged, thereby calculating the actual average dispensing flow rate per unit time. I do. The time interval at which the averaging is performed is set longer than the dead time so that the discharge flow rate detected during the dead time is not targeted for averaging. Further, it is necessary to adjust the required sampling time so that a short-period fluctuation such as a flow rate of the coal supplied to the distribution chute 13 (or 14) can be ignored.

(8) In the PI calculators 68 and 73, the signal (discharge flow rate) from the distribution flow rate setting device 67 (or 72) and the signal (discharge flow rate) from each averaging circuit 66 (or subtractor 77). PI calculation is performed on the basis of the difference from the above to calculate the amount of movement of the distribution chute 18 (the position correction value of the partition plate 18c). In the PI calculation, the proportional constant is corrected according to the total value of the actual average discharge flow rate of coal in the belt conveyor devices 11 and 12. This is because even if the difference between the set average discharge flow rate and the actual average discharge flow rate is the same, the distribution chute 13 necessary to eliminate the difference depends on the amount of coal input to the distribution chute 13 (or 14). This is to correct the difference in the moving amount of the distribution chute 18 (or the position correction value of the partition plate 18c) of (or 14).

(9) In the storage device 74 (or 75), the coal as the object to be dispensed distributed by the distribution chute 13 passes through the weighing machine 33 (or 34) and then to the weighing machine 35 (or 36). After temporarily holding the signal from the averaging circuit 65 (or 66) for the time required until the signal reaches, the signal is subtracted by the subtracter 76 (or 77).
Output to Then, the averaging circuit 70 (or 71)
(Discharge flow rate) from the storage unit 74 (or 75)
Of the belt conveyor device 1 by the distribution chute 14 by calculating the difference from the
The actual average discharge flow rate of the coal distributed to 1 and 12 is obtained.

Using the control device 60 described above, the two-system belt conveyor device 11.
Assuming that the mixing ratio of coal to be discharged in step 2 is set to, for example, 1: 1, the total amount of coal discharged by the reclaimer 1 at this time is 900 ton / h, and the total amount of coal discharged by the reclaimer 1 is 800 ton / h. . The average dispensed flow rate measured by the weighing machine 33 on the side of the belt conveyor device 11 and calculated by the averaging circuit 65 is 500 ton /
h, the average dispensed flow rate measured by the weighing machine 34 on the belt conveyor device 12 side and calculated by the averaging circuit 66 is 400
ton / h, the distribution flow rate setting device 67
Then, the belt conveyor device 11 and 12 both 450 to
n / h: 450 ton / h is set, so that 50 to 50 from belt conveyor device 11 to belt conveyor device 12
The distribution chute 13 needs to be moved by the distribution chute 13, and the distribution chute 18 is moved by the distribution chute drive means 78. Reclaimer 1 at this time
-The total amount of coal dispensed by 1 is 1700 ton / h. Then, assuming that the average dispensed flow rate measured by the weighing machine 35 on the side of the belt conveyor device 11 and calculated by the averaging circuit 70 is 900 ton / h, 450 ton / h is subtracted by the subtractor 76 to obtain 450 ton / h. The average dispensed flow rate measured by the weighing machine 36 on the side of the belt conveyor device 12 and calculated by the averaging circuit 71 is 80.
0 ton / h, 450 t
The result of the on / h subtraction is 350 ton / h. In the distribution flow rate setting device 72, the belt conveyor device 11
12 are set to 400 ton / h: 400 ton / h. Therefore, it is necessary to move the dispensed amount of 50 ton / h from the belt conveyor device 11 to the belt conveyor device 12 by the distribution chute 14, and distribute by the distribution chute driving means 79. The chute 18 moves.

As described above, the mixing ratio and the amount of coal discharged on each of the two belt conveyor devices 11 and 12 match the predetermined mixing ratio and amount of discharging.

Although the embodiment of the payout amount control device has been described above, the payout amount control device according to the present invention can be implemented as follows. That is, the present invention can be applied to the case where the number of the reclaimer and the subsequent belt conveyor device is one, and the case where the number of the reclaimers is two or more and the number of the belt conveyor devices is two or more.

The reclaimer is not limited to the rake chain type reclaimer, but can be applied to any reclaimer such as a chain scraper type reclaimer having a boom provided with a continuous scraping mechanism.

The quantitative dispensing equipment according to claim 4 is not limited to the quantitative dispensing equipment using a reclaimer, but also includes a quantitative dispensing equipment using various quantitative dispensing devices for carrying out the dispensed material from a lower part of a silo storing the dispensed material. Dispensing device can be applied.

[0052]

As is apparent from the above description,
The quantitative payout control device of the present invention has the following excellent effects.

(1) In a facility using at least one reclaimer and one belt conveyor device, the error between the dispensed flow rate and the set amount caused by using the dispensed amount of the weigher on the reclaimer side is minimized. At the same time, by controlling the running speed of the reclaimer in response to fluctuations in the dispensed flow rate caused by variations in the shape of the pile of objects to be dispensed and variations in the bulk specific gravity, the actual dispensed amount matches the set amount. be able to.

(2) In this type of apparatus, since the reclaimer relatively moves with respect to the belt conveyor device that conveys the articles to be discharged, the moving direction of the reclaimer (in the same direction as the traveling direction of the conveyor belt of the belt conveyor device or in the opposite direction). It is necessary to correct the dispensed flow rate set in accordance with the direction), but in the control device according to claim 2, this correction is easily and reliably performed by multiplying the set dispensed amount by the correction coefficient α.

(3) According to the control device of the second aspect, all the weighers provided on the subsequent belt conveyor device are installed on the ground, and those weighers are compared with the weighers installed on the reclaimer. Since the measurement accuracy is high, the dispensed flow rate of the weighing machine on the reclaimer side is corrected by taking into account the dispensed flow rate measured by those weighers, and the actual dispensed flow rate can be made to exactly match the set dispensed amount.

(4) In the control device according to the third aspect, even if the discharge flow rate of the reclaimer changes every moment due to the state of the pile of the articles to be discharged, the discharge amount set for each of the elevation angles of the boom of the reclaimer is reduced. By multiplying the corresponding reference traveling speed by the specific gravity correction coefficient β, the traveling speed of the reclaimer can be determined, and the actual dispensed flow can be matched with the preset dispensed amount.

(5) In the control device according to the fourth aspect, the articles to be paid out from the dispensing machines such as a plurality of reclaimers capable of making the dispensing flow rate coincide with the preset dispensing amount,
By distributing and feeding into a plurality of belt conveyor devices by the corresponding distribution chutes, the mixing ratio of the articles to be dispensed on each belt conveyor device can be surely matched with a preset mixing ratio. This eliminates the need for a hopper or a fixed-volume cutout device for absorbing the conventionally required fluctuations in the amount of dispensed, thereby reducing equipment costs and reducing the space required for installation.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a rake chain type reclaimer for discharging coal from a coal pile in a coal yard, which constitutes a part of a fixed-rate discharge control device of a discharge facility according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a distribution chute of the dispensing facility (FIG. 3) according to the embodiment of the present invention.

FIG. 3 is a plan view schematically showing a facility provided with two reclaimers of FIG. 1 and for quantitatively mixing coal by two subsequent belt conveyor devices via distribution chutes.

FIG. 4 is a block diagram showing an embodiment of a fixed amount dispensing control device of the reclaimer of FIG. 1;

5 is a block diagram showing an embodiment of a fixed-rate payout control device of the payout facility in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reclaimer 2 Track 3 Boom 3a Rake chain (continuous scraping mechanism) 4.11, 12 Belt conveyor device 10 Quantitative mixing equipment 13, 14, Distribution chute 18 Distribution chute unit 20, 60 Control device 21-24, 61, 62 Control means 31-36 weighing machine

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-57-102437 (JP, A) JP-A-54-88557 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 63/00 B65G 47/19 B65G 47/95 B65G 65/06

Claims (4)

(57) [Claims] A boom provided with a continuous scraping mechanism is provided so as to be able to move up and down, and an object to be discharged, such as coal, is provided in parallel with the track through the scraping mechanism of a reclaimer running along a track. A fixed-rate dispensing control device in a dispensing facility that conveys and dispenses to a succeeding belt conveyor device by a belt conveyor device, wherein a first control unit that controls a traveling speed of the reclaimer according to a set dispensing amount of the reclaimer. Second control means for correcting the set amount of dispensing of the reclaimer according to a traveling direction and a traveling speed of the reclaimer; an integrated value of a dispensing flow rate measured by a weighing machine provided in the reclaimer; and the subsequent belt conveyor device. The calculated value is compared with the integrated value of the discharge flow rate measured by the weighing machine provided in the weighing machine, and the discharge flow rate measured by the weighing machine of the reclaimer is corrected according to the calculation result. A third control means, which compares the set payout amount with an average payout flow rate per unit time measured by a weighing machine provided in the reclaimer while the reclaimer travels a predetermined distance, and calculates the calculated result. A fourth control means for controlling the traveling speed of the reclaimer by the first control means in accordance with the first control means. 2. The correction of the set payout amount by the second control means is performed by multiplying the set payout amount by a correction coefficient α calculated by the following equation: correction coefficient α = (V) ÷ ｛( V) ± (v)｝ V; conveyor belt running speed of the reclaimer belt conveyor device v; running speed of the reclaimer ± in the above equation is determined by the running direction of the reclaimer,
If the direction is the same as the traveling direction of the conveyor belt, the value is +, and if the direction is opposite, the value is-. The correction of the discharge flow rate measured by the weighing machine of the reclaimer by the third control means is calculated by the second control means to an integrated value of the discharge flow rate measured by the weighing machine provided in the subsequent belt conveyor device. By multiplying by the correction coefficient α, the integrated value of the converted reclaimer-based discharge flow rate is calculated as the integrated value of the discharge flow rate measured by the weighing machine provided in the reclaimer synchronized with the integrated value in time and period. Correction coefficient γ calculated by dividing
2. The quantitative dispensing control device in the dispensing equipment for coal or the like according to claim 1, wherein the dispensing is performed by multiplying the dispensing flow rate measured by a weighing machine of the reclaimer. 3. A dispensing flow rate measured by the weighing machine of the reclaimer corrected by the third control means is averaged by the fourth control means to calculate an actual average dispensing flow rate, and the set dispensing amount is calculated by the actual dispensing amount. A correction coefficient β is calculated by dividing by an average dispensing flow rate, a reference traveling speed is calculated for each boom undulation angle according to a set dispensing amount of the reclaimer, and a reclaimer is calculated by multiplying the reference traveling speed by the correction coefficient β. The fixed amount dispensing control device in the dispensing equipment for coal or the like according to claim 2, wherein the traveling speed is determined. 4. A succeeding belt conveyor device is composed of two belt conveyor devices, and two belt conveyor devices for a dispensing machine such as a reclaimer are spaced apart from each other in the running direction via respective distribution chutes. In the coal and other dispensing facilities that are connected to each other, the material to be discharged, such as coal, discharged by a fixed-rate discharging machine such as one reclaimer is distributed to two subsequent belt conveyors by a distribution chute at a preset ratio, and similarly. Two more downstream on the way
By distributing the articles to be dispensed by the first dispensing machine to the subsequent belt conveyors, a quantitative dispensing control device for quantitatively mixing the articles to be ejected from the two dispensing machines on the subsequent belt conveyor of each system . The average discharge flow rate calculated by measuring a predetermined time at a predetermined interval by a weighing machine provided corresponding to the upstream distribution chute, and a set distribution ratio of the two following belt conveyor devices. Of the difference from the set flow rate calculated by
Performs operation to calculate the amount of movement of the partition position of the distributing chute, and a control means for controlling the distribution amount (61), the average payout rate which is measured is calculated by meter heavy equipment corresponds to the distribution chute upstream, The value (payout amount) tracked by the time required for the material to be paid to reach the weighing machine corresponding to the downstream distribution chute from the upstream weighing machine is measured by the weighing machine corresponding to the downstream distribution chute. The same function as the control means (61) , which calculates the average dispensed flow rate of the articles to be dispensed from the downstream distribution chute to each of the two belt conveyor devices by subtracting from the calculated average dispensed flow rate. Another control means (6
2) , wherein a fixed amount dispensing control device for a dispensing facility for coal or the like is characterized in that the conveyed materials from the two dispensing machines are quantitatively mixed in each of the two conveyor systems.